20660229685 has 32 divisors (see below), whose sum is σ = 25714547712. Its totient is φ = 15925155840.

The previous prime is 20660229661. The next prime is 20660229691. The reversal of 20660229685 is 58692206602.

It is a de Polignac number, because none of the positive numbers 2^k-20660229685 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15112872 + ... + 15114238.

It is an arithmetic number, because the mean of its divisors is an integer number (803579616).

Almost surely, 2^20660229685 is an apocalyptic number.

It is an amenable number.

20660229685 is a deficient number, since it is larger than the sum of its proper divisors (5054318027).

20660229685 is a wasteful number, since it uses less digits than its factorization.

20660229685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 20660229685 in words is "twenty billion, six hundred sixty million, two hundred twenty-nine thousand, six hundred eighty-five".